I was driving on I-90 (East bound- right before the first Issaquah exit)and saw a green light or lit-up green object appear suddenly and fall quickly and then disappear. The edges of it were fuzzy- not crisp. It looked to be past Tiger Mountain- maybe in the North Bend area. It was over quick. I think that the driver in front of me saw it as well, because he/she put his brakes on for a second right after it happened.